考虑能耗的国际海铁联运速度优化模型

为实现海铁联运节能降耗,探讨考虑能耗的海铁联运速度优化问题.通过分析航运速度与能耗、铁路运输速度与能耗的关系,提出在满足运输时间要求下实现能耗最低的国际海铁联运速度优化模型.针对铁路运输速度与能耗关系的复杂性,将铁路运行速度离散变量通过数据拟合转化为连续变量,在此基础上构建海铁联运的非线性优化模型.数值分析结果表明,低速航运与相对高速铁路运输联合能显著地降低总能源消耗并缩短运输时间.

A model on speed optimization for sea rail intermodal transportation considering energy consumption

To attain energy saving during sea rail intermodal transportation, the speed optimization for sea rail intermodal transportation considering energy consumption is discussed.By analyzing the relationships between sea shipping speed and energy consumption and between train speed and energy consumption, a model on speed optimization for sea rail intermodal transportation is proposed to minimize energy consumption while meeting time constrain.Considering the complex relationship between train speed and energy consumption, the discrete train speed is transformed into a continuous variable by data fitting, and then a nonlinear programming model of sea rail intermodal transportation is formulated.Numerical results show that the sea rail intermodal transportation with low shipping speed and comparative high train speed is beneficial to reduce total energy consumption and running time.